governor romney is a good debater. i'm just okay. >> reporter: mitt romney heads to colorado today for his last minute cram session. romney fit in another rehearsal after church in boston on sunday. he's been practicing since june. while many believe wednesday's debate is a must-win for romney, his running mate paul ryan says this will not be a defining moment. >> i don't think one event will make-or-break this campaign. >> reporter: apparently not everyone got the memo to down play expectations. >> thursday morning you'll all be scratching your heads and say wow we have a barn burner now. >> reporter: the debate will center on domestic issues including the economy but right now romney is focused on foreign policy and has been slamming the president over his handling of the events in the middle east. in an op-ed in the "wall street journal" romney said the president showed weakness in the middle east. he said president obama heightened the prospect of conflict and instability. he doesn't understand an american policy t